hmm.. as the math is beyond me, what does this bug mean for existing implementation. more specifically, the 2 times i have used it:
+ in sean costello's single sideband AM frequency shifter:
http://www.csounds.com/udo/displayOpcode.php?opcode_id=50
+ converting B-format to stereo-uhj:
http://www.csounds.com/udo/displayOpcode.php?opcode_id=47
(and just to restate my opinion on backwards compatibility:
go forward!
throw the old code in an opcode plugin for anyone who
needs it and then never look back! )
-m
On Oct 25, 2007, at 7:10 AM, Victor Lazzarini wrote:
(no it's not Goedel going about stuff...)
>
Still waiting for someone to reply on this. I rechecked and
the outputs are definitely reversed. Now how do we deal with
it: change the code or change the manual?
>
The former will break backward compatibility, but just changing the
manual will make it not very intuitive (outs being
imag, real instead of real,imag).
>
Victor
>
At 16:57 19/10/2007, you wrote:
(no it's not to with his plans for mathematics...)
>
anyway, after almost going crazy checking and
rechecking my equations, I realised that the
Hilbert transform filter seems to have its
outputs the wrong way round. What is the
cosine output is the sine output and vice-versa.
(No wonder I could not get some ideas to work
properly.)
>
Can someone double-check this before we fix it?
(I used a sine input and checked the two signals
against each other. The 2nd output was in the
cosine phase against the 1st one in the sine
phase, but at this point I might be wrong).
>
This also explains why the example in the manual
has its up and down shifts the wrong way round too.
>
Victor
>
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Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth
>
>
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